Moody's, investment banks pinched by investors

On May 21, MarketWatch's Financial Stocks column incorrectly attributed a report of a computer glitch at Moody's Investor Services
MCO, +0.46%
and its impact on the company's rating of certain debt-valuation instruments. The Financial Times reported the problem. Moody's says it is investigating, and it has not confirmed existence of the error reported by the newspaper. See the corrected story.

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